Locomotive valve geae



'2 SheetsSheet 1.

(Model) L. ANDERSON.

8 8 1 P a M d e b n R w Ma GP E V L A V E V I T O M 0 G O L Rw 8 4 5 2 nm N INVENTOR WITNESSES ATTORNEYS.

2 N 0 S R E D N A L LOGOMOTIVE VALVE GEAR.

Patented Mar. 7.1882,

WITNESSES ATTORNEYS.

N. PETERS, PhnWLilhugI-mphcr, Washillgfwl, n cl i- A I UNITED STATES PATENT OFFICE.

LEONARD ANDERSON, OF PAIN ESVILLE, OHIO, ASSIGNOR TO HIM SELF AND EDGAR JENKINS, OF SAME PLACE.

LOCOMOTIVE VALVE-GEAR.

- SPECIFICATION forming part of Letters Patent No. 254,586, dated March 7, 1882.

Application filed July 26, 1881. (ModeL) To all whom it may concern Be it known that I, LEONARD ANDERSON, of Painesville, in the county of Lake and State of Ohio,'have invented a new and Improved Locomotive Valve-Gear, of which the following is a specification.

The object of this invention is to provide a more simple, inexpensive, easily-adjusted, and

. quick-acting gear than the ordinary link-motion.

The invention consists of a vertically-fixed lever, pivoted on the main pin, knuckle-pin, or other point on the parallel rods, having pivoted to its head on horizontal horns or pins two forward-extending rods, one of which connects by a pin with a perpendicular rockerarm, to whose lower end is pivoted the valverod,while the other forward-extending rod conmeets with a fixed slotted are that hangs nearly parallel with the rocker-arm, a pin in the endof said rod sliding in the slot of said are. This pin serves as the fulcrum on which the gear operates, and is adjustable by means of lever and suitable connections in the slot of the are, whereby the cut-off maybe varied and the steam reversed. Motion is transmitted to the gear by a quadrant-lever fixed on the parallel rods, all of which will be hereinafter set forth.

In the accompanying drawings, Figure 1 represents a partly sectional side elevation of a locomotive with my improved valve-gear in position. Fig. 2 is a plan of the same, partly in section, with the boiler removed. Fig. 3 is an enlarged partly sectional elevation of a portion of a locomotive with the valve-gear in position. Fig. 4. is an enlarged sectional end elevation on line a .10, Fig 3. Fig. 5 is an enlarged sectional elevation on line y 3 Fig 3. Fig. 6 is a front elevation of the slotted are.

Similar letters of reference indicate corresponding parts.

In the accompanying drawings, A represents the locomotive-frame 5 A, the boiler; B, the truck-frame C O, the driving-wheels; D, the parallel rod; D, the connecting-rod; E, apiston-rod E, a piston; F, a steam-cylinder; G, a steam-chest; G, a valve, and G a valvestem, all of which parts are of the ordinary construction.

H H are the guides for the piston-rod crossheads E and from one guide, H, to the other is extended a rocking bar, H, over which are caught the hooks I I, that connect with the truck-frame B, to hold the latter more secure from lateral motion.

On the outside of a parallel rod, D, near a knuckle-pin, a, is held the slotted end of a lever, K, by a pin, 1), which passes through the lever-slot c. The top or upper end of this lever K is forged with a conical horn or pin, 61, on each side, about the bases of which are formed annular channels or grooves f, and the ends of said horns or pins 61 are screw-threaded, as shown in Fig. 5. Over the inward-projecting horn or pin d is fitted one end of the rod L, that has a conical bore, 01, and projecting ring f, corresponding with the shape of the horn or pin d and the grooves f, and said rod L is held on said lever K by nut and checknut g g. A rod, M, is in the same manner fitted upon and secured to the opposite horn or pin d of the lever K. This method of connectin g the rods L M with the lever K, or rather offashioningtheirconnecting-points,isdeemed preferable to any other because of strength and closeness of the points thereby made; but other connecting devices may be employed with good effect. The rod L, extending forward, carries in its forward end, at right angles to it, a pin or stud, h, that passes through the vertical slot h of the slotted are N, which hangs suspended from the side of the frame A, and the inner end of this pin or stud his connected with a crank, k, of a rocking bar, 11, by means of a connecting-rod, L, while, from the opposite end of the rocking bar H, a crank, 1, extends upward and is connected by a rod, 1, with a lever, L, that is pivoted at the rear of the locomotive within reach of the engineer, so that by movement of said lever L the pin or stud It can be moved up'or down in the slot h of the are N, and the fulcrum of the valvegear be thus changed. The rod M is connected by means of a pin or stud, m, with a rockingarm, 0, that has its upper end pivoted to a lug, O, which is secured on the frame A, and hanging down in front of and nearly parallel with the are N, said arm 0 has pivoted to its lower end the outer end of the valve-stem G parts are moved by means of a slotted quad- These b rant-lever, P, that is firmly secured to a parallel rod, D, a stud, n, from the lever K entering the curved slot q in said lever P.

In the drawings but one valve-gear is shown, but it is designed in practice to apply two to a locomotive-engine.

When the locomotive is in motion, motion is imparted from the parallel rod D, through levers P K, rocking arm 0, and valve-stem G to valve G, the quadrant-lever P engaging upon the stud .n of the lever K, and the said lever K accommodating itself to the movement by adjusting itself on the pin 1). When the stud h is in the lower part of the sloth, as shown in Fig. 1, the valve G makes the longest stroke, and steam is taken in at first at the rear end of the cylinder F, as indicated; and when the stud h is moved to the upper part of the slot it, above the center thereof, the engine is thereby reversed, as shown in Fig. 3. The extent of the valve motion beingincreased by the distance of the fulcrum-stud'h from the center of the sloth, and being decreased as the said stud h is approached to the center of the sloth, the engineer, by suitable movements of the lever L is enabled to cut off steam at any desired point.

An objection to the link-motion is that the valve is inactive at a certain point when re versing the steam-4. 0., when the valverod sliding pin occupies amiddle position in thelink -while with this device there is no cessation of the valve movement when reversing the steam. With the link-motion a great deal of power must be expended to reverse the steam when the locomotive is under full headway, so that in'the attempt the eccentric-rods often become distorted, while with this improved device the reversal of the steam is effected with great ease and without danger to the mechanism.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. Alocomotive valve-gear, constructed substantially as herein shown and described, consisting of lever K, rods L M, stud h, slotted are N, rocking arm 0, and slotted quadrantlever P, arranged as set forth.

2. In a locomotive, the combination, with the parallel rod D, of the quadrant-lever P, lever K, provided with stud n and pins 01 d, rod L, carrying stud h, fixed slotted are N, rod M, stud m, lug O, rocking arm 0, and valve-stem and valve (3' G, arranged and operated substantially as herein shown and described, whereby the admission of steam into the steam-cylinder is regulated, as set forth.

. 3. In a locomotive valve-gear, the combination, with the lever K, rod L, carrying stud h, and slotted are N, of the rocking bar H, provided with cranks k Z, connecting-rod L l, and lever L substantially as herein shown and described,whereby said gear may be reversed, as set forth.

4. In a locomotive valve-gear, the combination, with the parallel rod D and rods L M, of the connecting-lever K, provided with conical horns d and annular channels f, substantially as and for the purpose set forth.

5. In a locomotive valve-gear, the combination, with the parallel rod D, of the slotted quadrant-lever P, lever K, provided with stud n, rod M, stud m, lug O, rocking arm 0, and valve-stem G substantially as herein shown and described, whereby the steam-cylinder valve is reciprocated, as set forth.

LEONARD ANDERSON.

Witnesses:

GEORGE SLoMAN, ANDREW A. AMIDON. 

